Stay-bolt structure.



E. i. DODDS.

STAY BOLT sRucTURE.

D APR 2 l TNESSES I l VENTOR UNITED.sTATnsrATENToFrIoE.

ETHeN-I. nomas, or PITTSBURGH, PENNSYLVANIA, AssIGNon. To FLANNERY BOLT COMPANY, or rITTsBURGmrENNsYLvnNm. n

f STAY-B OLT STRUCTURE.

Specification of Letters Patent.

Patented Maf. e 191e Appiication mea April .26, 191s.- .-sria1 No. ascisse.

To all lwhom t may concern:

Be it known that I, ETHAN I. DoDDs, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Stay-Bolt Structures; and I do hereby declare the f ollowing to be a full, clear, and exact descrlption of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements 1n staybolt structures for boilers,the object of the invention being to provide simple and eilicient means whereby the cap or closure of the bearing sleeve of a flexible staybolt structure may be quickly removed to permit 1nspection and testing of the bolt, and then quickly replaced.

With this and other objects in view, the invention consists in certain novel features of construction and combinations of parts ashereinafter set forth and pointed out in the claims.

In the accompanying drawings; Figure 1 is a view in section showing an embodiment of my invention; Fig. 2 is a view in elevation; Figs. 3 and 4 are views illustrating the manner of assembling the parts; Fig. 5 is a plan view of the cap or closure, and Fig. 6 is a sectional view of the cap or closure and showing a slight modification. K

1 represents a bearing sleeve threaded externally to screw into a boiler sheet, and to facilitate the application of said sleeve to the boiler sheet, itmay be provided with an angular portion 3 to receive a wrench. The sleeve 1 is provided interiorly with a curved bearing face 4 to receive the curved or spherical head 5 of a staybolt 6.

The bearing sleeve 1 is made with an integral extension 7, preferably having a larger bore than that portion of the sleeve in which the head of the bolt has its bearing, and said sleeve extension is provided in its wall with diametrically opposite elongated slots 8,-- each of which is diagonally disposed or inclined so as to form cam slots. Near one end of each of the cam slots, the inner face of the Ywithin the sleeve extension 7 and normally metrically opposite points with laterally proj ecting lugs 13-13 which, when the said cap is placed within or removed from the sleeve extension, will pass. through the longitudinal recesses 9 and then, when the cap is turned, said lugs will move through the slots 8 and engaging the cam walls of said slots, will cause the cap to be tightly clamped to its seat.

kInorder to facilitate the turning of the cap, the same may be provided with an angular head 14 to receive a wrench, and,` if desired, the lugs 13 may be provided with sockets 15 to receive a spanner wrench, as indicated in Fig.

When it is desired to expose the head of the bolt for inspection and to test the bolt, the operator will first turn the cap or closure 10 so as to unlock the same from its seat and then remove said cap from the sleeve-such removal being permitted by the alinement of the lugs 13 with thegrooves or recess 9 in the wall of the sleeve extension. It is apparentV that by reversing these operations, the ca or closure may be quickly replaced and lociied Having fully described my invention what I claim as new and desire to secure by Let'- ters-Patent, is K 1. In a staybolt structure, the combination with a bearing sleeve having cam slots, of a removable capor closure adapted to be seated in said sleeve and having lugs to enter said cam slots.

2. In a staybolt structure, the combina tion with a bearing sleeve having an extension provided with cam slots, of a removable cap in said sleeve extension and having lateral lugs to enter said cam slots, said sleeve extension having interior recesses for the passage of said lugs when the cap is being removed from or inserted into said sleeve extension.

8. In a staybolt structure, the combination with a bearing sleeve having a cap seat v on said seat, said "cap having lu'g's to enter' cp@"c'ca'tion'in' the presnc of tvvosubsfcrbsaid @am slots and the sleeve having interior- --ng Witnesses. 1'eCeSseS;01- the. passgqoiusad 111gS,;v and 1 means permitting the application ofavvronh- 1 .y r 5 to said cap for turning said cap to 100k or VlLtnesses:

unlock the saune. 1 .of 5; Gr. NOTTINGHAM, In testimony whereof, I have signed this "R. S. FERGUSON.

`nonna 

